FTG can save them or not ?

[xXMadaraUchiaXx]

from kaguyas dimension journey or.not ?

 

[Trúth]

not possible since neither can use it plus no seals in either dimension. so impossible.

 

[ugh]

Plausible.
EDIT : Implausible.

 

[sharingan7]

not possible since neither can use it plus no seals in either dimension. so impossible.

I think Naruto can....he had the ftg kunai

 

[Sasori]

I think Naruto can....he had the ftg kunai

The Kunai that got knocked out of his mouth and he no longer has it

 

[ATD]

Kakashi has still one of the kunais,
Btw, is it proven that one can't use a space time jutsu in an other dimension?